Rather than us giving you suggestions, I think you should ask yourself what you want and what you are willing to do for it?

In KPMG, its hard work and yes you learn a lot, but sometimes you also spend a lot of time doing repetitive work (especially during audits). The brand definitely helps you in your career, and if you finish your three years with CPA/ICAEW/ICAA/MICPA or whatever qualification, you can go to any other company without much difficulty.

That being said...you may not be able to get this opportunity to enter BNM again. I don't know how often opportunities in BNM come but I do know that if you work in BNM, and hopefully you get into the "money" departments like Treasury, Investment, Trade Financing, Corporate Finance, Money Markets, Statistics (The one that sets BLR and stuff), chances are you are set for life. Hell, you may even make it into World Bank, UBS, Credit Suisse or some other big banks out there.

If you wanna be rich, it's better to be in BNM where you get to learn about the policies and maybe you can learn some tips and tricks about investment there.